Apparently Trump's spokesman is now saying Trump didn't "literally" mean to say that Obama personally wire tapped him. This despite Trump's tweet calling Obama a "bad (or sick) guy" for wire tapping him.
You are right that Trump's tactics have worked really well for him, including outright lies. But his success with lies has bred an awful sense of complacency that he can get away with anything. I think he will become unstuck by his lies at some point. Fatigue is bound to set in as the public simply don't believe a word the president says, even his supporters. And he's no doubt broken many rules, which will come back to haunt him at some point,
All this assuming he doesn't start some terrible civilisation ending confrontation first of course.